Question 13007 of 844 · Washington 01 Journey Level Electrician Exam
What is the full-load line current of a balanced 30 kVA three-phase load supplied at 208 volts?
Exactly one answer is correct.
You got of questions right. Here on the question pages nobody remembers which ones you got wrong. The trainer saves your progress and asks the mistakes again until they stick.
Or free: the 10 questions most people get wrong
Show solution
Correct answer to question 13007
- C: 83.3 A
Explanation
I = kVA x 1,000 / (E x 1.732) = 30,000 / (208 x 1.732) = 83.3 A. The answer 144.2 A results from treating the load as single phase.
More questions: Electrical Calculations
- 13008A single-phase 240 volt resistive load draws 32 amperes. What is the load in kilowatts?
- 13009A three-phase 480 volt motor draws 40 amperes per line at a power factor of 0.85. What is the true power input?
- 13010A load consumes 72 kW at a power factor of 0.80. What is the apparent power?
- 13011A load has an apparent power of 100 kVA and a power factor of 0.80. What is its reactive power?
- 13012A motor delivers 10 horsepower at the shaft while drawing 8.5 kW of electrical input. What is its efficiency?
- 13013A motor takes 20 kW of electrical input and operates at 90 % efficiency. What is its output in horsepower?